Multi-purpose work holding means

ABSTRACT

A work holder device providing precise multipositioning of a work piece with respect to three dimensional and angular relationships for the machining, grinding and the like of surfaces on the work piece. A work holder body member of right angle type constructed and arranged to provide holding and securing of a work piece in a multitude of desired positions with a reduced set up time and providing for elimination of some set up steps normally employed in the positioning of a work piece for a working operation.

1 51 July 23, 1974 United States Patent 11 1 Petrant MULTl-PURPOSE WORKHOLDING MEANS 2,995,962 8/1961 51/216 R 33/174 5 3,423,885 1/1969Crandall 3,553,908 l/l971 B0ehm............... 3,736,666 6/1973 Sutter ek m0 v0 H9 S f a 1 6% ma n A Gm L r Md 0W RB 0 t n e V n I l 6 7 .1

1 Filed: OTHER PUBLICATIONS Combination V-Blocks, Parallels, &Angle-Plates Baker in American Machinist, 4-15-15, page 655.

July 31, 1972 21 Appl. No.: 276,392

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0 m t e m m ax o O B A h y Wm m a m W 1 mum 7 PAA U A tioning of a workpiece with respect to three dimen- References Cited sional and angularrelationships for the machining, UNITED STATES PATEN grinding and thelike of surfaces on the work piece. A

7/1915 Simmons..

A 1,148196 work holder body memberof right angle type constructed andarranged to provide holding and securing of a work piece in a multitudeof desired positions with a reduced set up time and providing forelimination of some set up steps normally employed in the positioning ofa work piece for a working operation.

6 Claims, 16 Drawing Figures u n C u wmv. mw uru nnd 66 m 1a d mw VJCm1G aee o WTBLHCO 9055676 2444445 9999999 1111111 3623067 SHEET 1 BF 3mumsnm wu 1 MULTI-PURPOSE WORK HOLDING MEANS BACKGROUND OF THE INVENTIONVarious devices are used in the tooling industry for preciselypositioning a work piece for a tooling operation. Among such devices areangle irons of different types such as a right angle iron, measuringirons, slotted angle irons, pallet irons, box angle irons, sine blocks,sine bars, V blocks, many of which are disclosed in catalogue number 511of Taft-Peirce Manufacturing Co. of Woonsocket, R.I. Such devices areprecision made and are employed in tool making by clamping a work piecethereto so that the work piece may be supported and precisely positionedwith respect to a machining tool, grinder, or some other tool member forprecise working of a surface on the work piece. Such prior proposed workholding devices were useful for specific tooling operations. In theevent a different tooling operation was required the work piece wasoften transferred to a different type of work holder. Such transfer of awork piece to a different work holding device was time consuming becauseof the care and accuracy with which the work piece was required to besecured to the work holder device and precisely positioned with respectto the tool.

SUMMARY OF INVENTION The present invention relates to a novel workholding means so constructed and arranged as to readily position a workpiece with respect to a tool for precise, ac-

curate working or machining of the work piece.

An object of the present invention is to disclose and provide a workholding means wherein a work piece is capable of being positioned in amultitude of different positions for a working operation whilemaintaining the desired rigid standards of preciseness and accuracy forsuch work.

Another object of the present invention is to disclose and provide awork holding device which can be utilized for positioning a work pieceand performs the functions of several prior proposed tool holdingdevices such as sine blocks, V blocks, angle blocks, whirly-gigs,indexing, and other functions without providing socalled secondaryset-ups.

Still another object of the present invention is to disclose and providea multi-purpose work holding device having rigidity, rapid adjustmentand a rugged construction whereby work pieces of various type may bereadily positioned, secured and worked upon.

Generally speaking, the present invention contemplates a work holdingdevice provided with a body member similar to a right angle iron. Thebody member is provided with a plurality of sets of V grooves soarranged and spaced to permit its use as a sine bar or block. The bodymember is also provided with selectively arranged holes adapted toreceive pins for positioning a work piece for grinding at normal anglesor grinding at compound angles. The body member is provided with meansfor registering its relationship with respect to a work table in such amanner that the work holding means is capable of positioning a workpiece in a desired relation to the tool with the set-up time minimized.The right angle body member is further provided with V grooves and indexrecesses adapted to receive an indexing device cooperable with the bodymember whereby angular rotational adjustment of a cy- 2 lindrical workpiece may be readily achieved with respect to a tool.

Many other objects and advantages of the present invention will bereadily apparent from the following description of the drawings in whichexemplary embodiments of this invention are shown.

In the drawings:

FIG. 1 is a perspective view of a work holding device embodying thisinvention.

FIG. 2 is a side elevational view of the device shown in FIG. 1illustrating a work piece held at an angle to horizontal for grinding atan angle to the axis of the work piece.

FIG. 3 is a side elevational view showing the device of FIG. 1 with thework piece of FIG. 2 positioned for cutting a slot at the now angularlyground end of the work piece.

FIG. 4 is a side elevational view of the device of FIG. 1 showingpositioning of the work piece at a selected angle to the horizontal,said angular position being pro vided by use of V-grooves on one of thebody portions of the device.

FIG. 5 is a side elevational view of the device of FIG. 1 illustratingpositioning of the work piece of FIGS. 2, 3 and 4 at a different angleby utilizing V-grooves on another body portion of the device.

FIG. 6 is a perspective view of the device shown in FIG. 1, the viewbeing taken from below and in front of the main body portions of thedevice.

FIG. 7 is a side elevational view of the device shown in FIG. 1illustrating the use of an index means for angular positioning of thework piece.

FIG. 8 is a side elevational view of the device and index means shown inFIG. 7 with the work piece positioned for grinding an angular flat onone end of the work piece.

FIG. 9 is a transverse sectional view taken in the plane indicated byline IXIX of FIG. 8.

FIG. 10 is a side elevational view showing a different work piece heldagainst one of the external surface means of device, the device beingpositioned at a selected angle by V-grooves provided on one of thesecond surface means of the device.

FIG. 11 is an elevational view of the device shown in FIG. 10 wherein awork piece is positioned for composite angular grinding of a surface onthe work piece by positioning the work piece at a selected angle withpins inserted in sine holes on one of the first surface means on thedevice.

FIG. 12 is a view taken from the plane indicated by line XII-XII of FIG.11.

FIG. 13 is an elevational view of an angle plate provided with certainof the features embodied in the device shown in FIG. 1.

FIG. 14 is a sectional view taken in the vertical plane indicated byline XIV-XIV of FIG. 13.

FIG. 15 is an elevational view of a V-block provided with certain of thefeatures embodied in the device shown in FIG. 1.

FIG. 16 is a sectional view taken in the inclined plane indicated byline XVI-XVI of FIG. 15.

Referring first to FIGS. 1 and 2, a work holding means embodying thisinvention may comprise an integral body member generally indicated at 20having generally the shape and configuration of a right angle iron. Bodymember 20 may comprise a first body portion 21 and a second body portion22 disposed at right angles to body portion 21. Body portions 21 and 22may be of the same cross-sectional thickness and of the same width. Bodyportions 21 and 22 provide first rectangular flat finished surface means23 and 24 in contiguous relation and of a uniform width.

Work holder means 20 also includes a web member 25 of angularconfiguration and comprising a web leg 26 parallel to body portion 21and a web leg 27 parallel to body portion 22. Web member 25 bridges theincluded angle of 90 degrees between the body portions- 21 and 22. Webleg 26 is provided with a surface means 28 lying in a plane common tothe plane formed by the top edge face 29 of body portion 22. Web leg 27provides a surface means 30 lying in a plane coplanar with the plane ofedge'face 31 of body portion 21, said second surface means 28 and 30being at right angles to each other and in contiguous relation. Thesecond surface means 28 and 30 are of reduced width as compared to thewidth of the first surface means provided by body portions 21 and 22.

I The structure briefly defined above is essentially that of a rightangle iron. The first and second surface means are finished in precise90 degree relationship and surfaces'are in precise parallelism.Preferably second surface means 28 and 30 on web member 25 are widerthan the surfaces provided on prior right angle blocks for purposeslater described.

Means are provided for positioning the body member 20 for performingangular work, that is grinding, machining or cutting a surface on a workpiece at an angle to an axis of the work piece. Such means include a setof V grooves 32 on surface means 23 of body portion 21, another set of Vgrooves 33 on surface means 24 of body portion 22,'and still another setof V grooves 34, provided on the second surface means specifically thesurface 28 and the edge face 29 of the leg member 26 and body portion 22respectively. The spacing of the grooves in each set of grooves is asine related distance apart, such spacing being precise. Each set of Vgrooves 32, 33 and 34 is adapted to receive a roll or dowel 35 of thesame diameter. When dowels 35 are associated with a set of V grooves,the body member 20 is readily adapted to perform the function of a sinebar or sine block from any one of three different surfaces. Such use ofbody member is illustrated in FIG. 2 where dowels 35 are positioned inthe set of V grooves 32, one dowel 35 being positioned upon a finishedreference surface 36 and the other dowel- 35 being positioned at aselected distance above reference surface 36 by one or more shimelements 37 for precisely positioning the exemplary work piece at aselected angle, for example three degrees, with respect to a planeparallel to reference surface 36. In FIG. 2 the work piece isillustrated as a core pin 39 having a head 40 and a free end 41 on whichan angular surface 42 is to be formed by a suitable tool 43. Work piece39 is securely and precisely positioned in a longitudinally extending Vgroove 45 provided in the second surface means 28 of the web leg 26. Asuitable clamp 46 may hold work piece 39 in V groove 45.

FIG. 4 illustrates the body member 20 carrying the work piece 39 asillustrated in FIG. 2 but positioned at a much greater angle such as 30by a shim block 48 to permit forming or cutting of tapered surface 42 ofthe work piece 39. In addition, while work piece 39 is held on device 20as shown in FIG. 4, notch 49, flat 49a, and slope 49b may be cut thereinwithout changing the set up of the work piece on device 20. Thus aplurality of complex cutting operations may be performed with accuracy,such capability being enhanced by the freedom to measure with respect tothe work piece. In collet set ups, the work piece must be removed,marked and repositioned.

Dowels are normally removable from their associated transverse groovesand are not fixed therein. In the event of a specific work setup wheredowels 35 are desired to remain fixed in a V groove, a suitable setscrew means may be provided in each dowel for cooperation with a tappedhole in the bottom of a V groove. However, removability of dowels 35 ispreferred 'because dowelsare not needed'for non-angular set ups, may beobstructive in other set ups, and provide the advantage of selectiveplacing of dowels 35 in one of the other sets of V grooves on the bodymember as shown, for example in FIG. 5. v

In FIG. 5 dowels 35 are shown positioned in V grooves 33 provided on thebody portion 22. One dowel 35 is in contact with reference surface 36and the other dowel 35 is seated upon suitable shims 37 to provide aselected angle such as 5 degrees for grinding an angular end face 50 onthe free end of work piece 39.

Use of the V grooves in sine relation is further shown in FIG. 10wherein dowels 35 are positioned in the set of V grooves 34 provided inthe end face 29 of body portion 22 and in the distal end of leg member26 of the web member 25. ln FlG. 10 a different form of work piece 39ais shown clamped to surface 23 of body portion 21 to permit grinding ofan angular face on work piece 39a. The body member 20 is positioned ata'selected angle by a shim block 51.

The work holding means of this invention is also readily adapted to theforming or cutting of surfaces at compound angles on a work piece. FIGS.6, l1 and 12 show positioning of a work piece on the body member 20 topermit such forming of a compound angle. In FIG. 6 body portion 22 isprovided with a plurality of arcuately arranged holes 53 and 54 whichconverge toward the upper section of body portion 22 and which includereference bottom holes 530, 54a parallel to surface means 23 and apreselected distance apart hereafter referred to as Sdistance.S-distance is the distance between centers of sine rolls, buttons, orthe equivalent, for example 5 inches, 10 inches, and is a preselecteddistance to correlate with reference tables com monly used in themachine tool industry for sine plates, sine bars, and other sineequipment to permit rapid accurate positioning of work (Taft-PierceCatalog No. 51 1, pages 6 10 inclusive). In this example S-distance isused for the distance between centers of a reference hole 53a and anyone of holes 54 a, 54, or a reference hole 54a and any one of holes 53a,53. Holes 54 are arcuately spaced apart an S-distance from bottomreference hole 53a so that insertion of dowel pins 56 in selected holeswill generate angles with respect to a plane parallel to the plane ofsurface means 23 of from 0 to 10, 20, 30 and 45. Holes 53 are similarlyrelated to bottom reference hole 540. Other angles can be readilyachieved by using well known gauge blocks since the spacing between thepins 56 in respective holes 53a, 54 and 54a, 53 are always thepreselected S-distance apart.

AS best shown in FIGS. 11 and 12, a work piece such as 39b may beclamped by suitable means, not shown,

against the surface means 24 of the leg portion 22. Body member 20 maybe positioned at a selected first angle by using dowels 35 in V grooves32 and a shim block 57. Pins 56 may be inserted in the selected pinholes 53 and 54 to provide a suitable angle upon which a mounting bar 59is supported to position work piece 39b at the desired compound anglewith respect to the tool 60. From a consideration of FIGS. 11 and 12 itwill be readily apparent that the angular surface at 61 being formed bythe tool 60 lies at a compound angle with respect to the normal axis ofthe work piece 39b.

Means for further adjustably positioning the work holder device of thisinvention in order to selectively position a work piece with respect toa tool includes elongated angle slots 64 and 65 provided in bodyportions 21 and 22 respectively. Each slot 64 and 65 extends throughsaid body portions and is disposed at an angle of 45 to the longitudinaland lateral axis of the body portions. Each slot 64 and 65 is adapted toreceive therethrough a bolt means 66 which serves to securely clamp thework holder device to a work bed or table provided with referencesurface 36. Body member20 may thus be readily angularly positioned withrespect to the axes of the work table. To facilitate precise alignmentwith respect to the axis of the machine, alignment holes 67 are providedon the longitudinal and transverse axes of the body portions and spacedapart a preselected S-distance. Alignment holes 67 receive pins whichmay extend into the T-slot in the machine bed and bear against one orthe other edges thereof for precise reference and alignment purposes.Adjustment of body member 20 with respect to a tool 7 is thus furtherfacilitated and the body member may be precisely mounted on the machinetable in proper relationship to a tool with set-up time minimized.

In FIG. 3 body member 20 is positioned with its table face or surfacemeans 23 against a reference surface 36 of a work table and heldthereagainst by the bolt means 66. In FIG. 3 a work piece 39 ispositioned with its axis parallel to reference plane 36 for the purposeof providing an axially extending slot 70 in the free end 41 of the workpiece by means of a disc cutter cutting tool 7 1.

Means for indexing a work piece such as a headed ejector or corecylindrical rod 72, FIG. 7, into a selected rotational position isanother advantage provided by the construction of body member 20. InFIG. 7 work piece 72 is seated in longitudinally extending V groove 45provided in the web leg 26. Along the length of web leg 26 and adjacentto opposite ends thereof are provided recesses 73 and 74 adapted toreceive an index bushing 75. Index bushing 75 includes a through bore 75of a selected diameter to readily slidably accommodate cylindrical workpiece 72. Index bushing 75 is secured against relative rotationalmovement with respect to work piece 72 by a set screw 77, FIG. 9. Indexbushing 75 is thus in fixed relation to the work piece and is looselyaccommodated in recess 73 so that the work piece 72 may firmly rest inthe V groove 45. Head notches 73a, 74a are formed at a selected distancefrom working surfaces 24 and 27 to receive heads 40 of standard core orejector rods.

Index bushing 75 is provided with a plurality of selectively angularlyspaced radial bores 79 adapted to receive one end of an index pin 80.Bores 79 may be provided in selected angular spaced relation such as 90,45, 30 and apart. To facilitate location of a plural- 81 (which may havea small stop flat therein) serves as a positive precise top forrotationally positioning work piece 72. Thus to determine the precisediameter upon which the slot is to be cut, FIG. 3, the index bushingwill be turned to a selected position before the work piece 72 is heldand clamped in the V groove 45. In the event a cross slot was desired atthe index pin would be placed in an index bore spaced 90 from theinitial pin position and after the pin had been placed in the index boreand positioned against edge 81, the cross slot could be cut in precisely90 relations with the original slot.

Likewise, as shown in FIG. 8 index 75 may be selectively rotationallypositioned to turn work piece 72 through successive 90 angles to provideflats 83 on the end of work piece 72. In FIG. 8, work piece 72 isillustrated as mounted in a V groove 85 extending longitudinally insurface 30 of the web portion 27. Leg portion 27 is provided with indexreceiving recesses 86 in a manner similar to the recesses 73 and 74 ofweb portion 26.

It is important to note that longitudinal V grooves 45 and 85 providedin respective surface means 28 and 30 are symmetrical with respect tothe body member and in this example, the apices of the Vs lie in avertical plane longitudinally bisecting the body member. A work piecesecured in one of the longitudinal Vs 45 and 85 is thus preciselyrelated to other reference or working surfaces to thereby permitadditional work on the work piece without removing the piece from the Vgroove. Since the surface means 28 and 30 are wider than those in aright angle iron, the V grooves 45 and 85 may be largerand mayaccommodate work pieces of greater diameter. In addition, one of theworking V grooves 45, 85 may be made wider than the other so thatthediameters of work pieces accommodated by the V grooves 45, 85 mayrange up to two or three inches. The body member thus is useful as a Vblock.

In FIG. 8 it will be noted that the body member 20 is being utilized inanother position to angularly position work piece 72 with respect to atool 87. Index bushing 75 and the extra width of web means 25 and theselected size of the V grooves 45 and 85 therein provide foraccommodation of cylindrical work pieces of varying diameter as forexample from 7% inch to 2 inches or more. This arrangement also providesfor hand spin grinding of a work piece by loosening the clamp means andso returning the work piece by hand.

Some of the features mentioned above which have been applied to a rightangle iron may also be applied to other work holding devices asillustrated in FIGS. 13-16 inclusive. In FIGS. 13 and 14 an angle plateis provided with a base or table portion 101 and an upstanding workportion 102 at right angles to portion 101. Each of the portions 101 and102 may be provided with a slot 103 disposed at a 45 angle to the rightangle axes of the leg portion for reception of a work table hold-downbolt means as previously described. The center of slot 103 is at theintersection of the right diate set-up and alignment of the angle of thework on -a work table. Each of the portions 101 and 102 may also beprovided with the arcuately arranged holes 106 and 107 in which thebottom holes are spaced apart a sine distance and the remaining holesare spaced apart a selected angular relationship with respect to thebottom hole of the other arcuate set of holes. Thus the angle plate 100may support through the use of pins received in holes 106 and 107 a workpiece for presenting the work piece to a machine tool for grinding asurface thereon at a selected angle.

In FIGS. 15 and 16a V block 110 is illustrated. V block 1 includes a setof V grooves 11 l on table surface 112 of the block and also a set of Vgrooves 113 on a contiguous surface. Sets of grooves 111 and 113 includeV grooves of selected width and depth and the grooves ofeach set arespaced apart a preselected S- distance and are adapted to removablyreceive rollers or dowels 114 to position the V block at a selectedangle by means of shims or guage blocks 115- as shown in FIG. 15.

A V block such as lltl is normally provided along one surface with arelatively wide and deep V groove 116 adapted to hold a cylindrical workpiece such as work piece 117. In spaced relation along V groove 116, Vblock 110 may be provided with an index bushing recess 119 and a workpiece head recess 120. A suitable strap type clamp means 121 may beprovided for securely holding work piece 117 in the V groove. Indexbushing 122 may be provided with angularly spaced, radially extendingsets of holes 123 as in the prior embodiment of an index bushing, saidholes receiving an index pin 124 for rotationally positioning work piece117.

It will thus be apparent that V block 110 is now capable of providingthe function of a sine plate in combination with a means forrotationally positioning a work piece with respect to its axis forangular and rotational working thereof.

The advantages of the right angle iron will be readily apparent to thoseskilled in tool making. The work holding body member 20 not only may beused for the purposes which it previously served but also is capable ofuse as follows: first as a reversible sine plate or block employing oneof three different surfaces on the block and thereby eliminating asecondary set up in a machining or inspection operation, second, acompound sine block utilizing one of two different surfaces to readilylocate and position a work piece for the working thereon of a compoundangle; third, as a V block by utilizing the 45 angle hold-down slot oneach of two leg portions of the angle iron together with precisealignment of the body member by the alignment holes in the leg portionsof the block for fast and accurate set-ups; fourth, rotationally orangularly positioning of a cylindrical member with respect to its axisby means of the index bushing.

The modified right angle iron as described above is thus adapted toperform a sequence of complex operations with high interrelatedpreciseness and accuracy, without loss of time caused by the necessitypreviously of secondary set-ups. The work piece is capable of beingpositioned with respect to a tool in virtually any gular flats, tapers,squares, and chamfers may be readily machined or ground. Those skilledin the toolmaking art will recognize the versatility and usefullness ofthe several adaptations of the above-described work holding means whichembodies this invention.

It will also be understood that costs of set-ups are minimized becauseof the several features of construction of the device 21), thatinspection of the work is facilitated, and that measurements along thework can be readily made. The angularly disposed slot in each of thebody portions enhances set up time because no indicating is required;that is the step of precisely locating a surface of a work piece uponwhich work is to be performed (Taft Pierce Catalog No. 511 page 2). Thework holding device 20 constructed with the features in many differentpositions for work thereon by atool.

The several features of this invention have been exemplary shown withrespect to a right angle iron, angle block, and V block. They may alsobe applied to a tool makers vise which has precision finished surfaceson. an elongated generally rectangular body, having ,an upstanding fixedjaw portion at one end and a slidable jaw member movable by a feed screwthreadedly carried in an upstanding body portion at the other end of thebody. Sets of transverse V grooves spaced'a preselected S-distance apartmay be cut in the bottom and side surfaces of the vise body to receivesine rolls for positioning the vise body at a selected angle of gaugeblocks. In addition the upstanding fixed jaw portion may be providedwith arcuately arranged holes a preselected S-distance apart such asholes 53 & 54 described above. Thus the modified vise permitspositioning a work piece for angular and compound angular working inaddition to its normal use as a vise.

It is understood that various other modifications and changes may bemade in the work holding means described above which come within thespirit of this invention and all such changes and modifications comewithin the scope of the appended claims are embraced thereby. I

I claim:

1. A device for precise multi-positioning of work three dimensionallyand angularly about an axis thereof for machining, grinding and thelike, comprising in combination:

an integral body member having a plurality of surface means arranged inright angle relationship in rectangular form;

a first two of said surface means being in contiguous relation andhaving uniform width,

each of said first two surface means being provided with a pair ofparallel transversely extending V- grooves spaced apart a preselecteddistance and adapted to removably hold positioning rods of selecteddiameter;

a second two of said surface means in contiguous relation having uniformwidth less than the width of said first two of said surface means and insymmetrical relation with the first surface means, and second two ofsaid surface means having longitudinally extending V-grooves adapted toaxially position a work piece;

one of said second two of said surface means being provided with spacedtransverse recesses between ends thereof adapted to receive an indexmeans to selectivelyangularly position a work piece about its axis; ione of said second two of said surface means includmg a transverseV-groove adjacent one of said body portions having a first surfacemeans, and a transverse V-groove on said one of said second surfacemeans adjacent to the other of said second surface means. 2. In a deviceas stated in claim 1 wherein at least one of said first surface means isprovided on a body portion having a slot therethrough extendingdiagonally with respect to one of the surface means of each of the firstand second surface means for securing said body member at an angle on awork table.

3. In a device as stated in claim 1 wherein a body portion providing oneof said first surface means is provided with holes arcuately spaced apreselected distance from a reference hole, the holes being adapted toreceive pins for supporting a work on said pins at a selected angle.

4. In a device as stated in claim 1 wherein at least one of said firstsurface means includes alignment holes located a selected distance apartand at 45 to a diagonally extending slot through said one of said firstsurface means.

5. In a device as stated in claim 1 including index means having radialholes angularly spaced and adapted to receive a pin,

said index means being carried in a transverse recess in a longitudinalV-groove and adapted to hold a I 10 work piece;

said radial holes being so arranged with respect to a stop face on saidbody member to provide precise angular positioning of said work piece.

6. In a multi-purpose work holding means, the combination of:

an integral body member having two plate-like body portions providedwith external planar surfaces lying at right angles to each other;

a web member bridging the included angle between said body portions andhaving web legs each provided with an external face normal to saidplanar surface contiguous thereto;

means provided in at least one of said body portions of said body memberto precisely locate said body member and work associated therewith on awork table;

said locating means including a pair of alignment holes spaced aselected distance apart on each longitudinal and lateral axis of saidbody portion,

and a through slot in said body portion at 45 to each of said axes andhaving a slot axis intersecting said longitudinal and lateral axes at acommon point of intersection;

pairs of parallel transverse V-groove means spaced apart a selecteddistance on said planar surfaces and on at least one of said externalweb member faces;

and longitudinally extending V-groove means on at least one of saidexternal faces of said web member for supporting a cylindrical workpiece.

1. A device For precise multi-positioning of work three dimensionallyand angularly about an axis thereof for machining, grinding and thelike, comprising in combination: an integral body member having aplurality of surface means arranged in right angle relationship inrectangular form; a first two of said surface means being in contiguousrelation and having uniform width, each of said first two surface meansbeing provided with a pair of parallel transversely extending V-groovesspaced apart a preselected distance and adapted to removably holdpositioning rods of selected diameter; a second two of said surfacemeans in contiguous relation having uniform width less than the width ofsaid first two of said surface means and in symmetrical relation withthe first surface means, and second two of said surface means havinglongitudinally extending V-grooves adapted to axially position a workpiece; one of said second two of said surface means being provided withspaced transverse recesses between ends thereof adapted to receive anindex means to selectively angularly position a work piece about itsaxis; one of said second two of said surface means including atransverse V-groove adjacent one of said body portions having a firstsurface means, and a transverse V-groove on said one of said secondsurface means adjacent to the other of said second surface means.
 2. Ina device as stated in claim 1 wherein at least one of said first surfacemeans is provided on a body portion having a slot therethrough extendingdiagonally with respect to one of the surface means of each of the firstand second surface means for securing said body member at an angle on awork table.
 3. In a device as stated in claim 1 wherein a body portionproviding one of said first surface means is provided with holesarcuately spaced a preselected distance from a reference hole, the holesbeing adapted to receive pins for supporting a work on said pins at aselected angle.
 4. In a device as stated in claim 1 wherein at least oneof said first surface means includes alignment holes located a selecteddistance apart and at 45* to a diagonally extending slot through saidone of said first surface means.
 5. In a device as stated in claim 1including index means having radial holes angularly spaced and adaptedto receive a pin, said index means being carried in a transverse recessin a longitudinal V-groove and adapted to hold a work piece; said radialholes being so arranged with respect to a stop face on said body memberto provide precise angular positioning of said work piece.
 6. In amulti-purpose work holding means, the combination of: an integral bodymember having two plate-like body portions provided with external planarsurfaces lying at right angles to each other; a web member bridging theincluded angle between said body portions and having web legs eachprovided with an external face normal to said planar surface contiguousthereto; means provided in at least one of said body portions of saidbody member to precisely locate said body member and work associatedtherewith on a work table; said locating means including a pair ofalignment holes spaced a selected distance apart on each longitudinaland lateral axis of said body portion, and a through slot in said bodyportion at 45* to each of said axes and having a slot axis intersectingsaid longitudinal and lateral axes at a common point of intersection;pairs of parallel transverse V-groove means spaced apart a selecteddistance on said planar surfaces and on at least one of said externalweb member faces; and longitudinally extending V-groove means on atleast one of said external faces of said web member for supporting acylindrical work piece.